What specific ideas does the author introduce to tie the events of september 11th to the specific study pf complex systems?

Which ideas are expressed as literacy themes?

3. what is the purpose of a lead sentence or paragraph? to display your most convincing reasons and arguments to you revise the overall structure of your work to interest readers and introduce your writing style to add details and elaborate on your ideas

Nthis poem by ruskin bond, what does the use of the word heart-beats suggest about the narrator's attitude toward life?